Illuminating structure.



PATENTED JAN. 6, 1903,

F. L. O. WADSWORTH. ILLUMINATING STRUCTURE.

APPLICATION FILED APR. 9, 1898.

no MODEL.

Witness m: scams vzreks co. moroumm WASHINGTON. n. c.

U ITED STATES PATENT OFFICE.

FRANK L. O. WADSWORTH, OF WILLIAMS BAY, WISCONSIN, ASSIGNOR, BY MESNEASSIGNMENTS, TO PRESSED PRISM PLATE GLASS COMPANY, A CORPORATION OF WESTVIRGINIA. I

ILLUMINATING STRUCTURE.

SPECIFICATION forming part of Letters Patent No. 717,783, dated January6, 1903.

Application filed April 9,1898. Serial No. 677,074. (No model.)

To all whom it may concern.-

Be it known that I, FRANK L. O. WADS- WORTH, a citizenof the UnitedStates, residing at Williams Bay, in the county of Walworth and State ofWisconsin, have invented certain new and useful Improvements inIlluminating Structures, of which the following is a specification.

My invention relates to illuminating strucro tures; and it consists inproviding two illuminators and in so constructing and arranging the samethat one will deflect or turn certain light-rays in a desireddirectionwhile permitting the passage of other light-rays to the otherstructure, by which these rays are turned in the same directions as thefirst, as fully set forth hereinafter and as illustrated in theaccompanying drawings, in which- Figure 1 is a sectional viewillustrating my invention as applied to the window of a room. Fig. 2 isa like view showing a different arrangement of the illnminators.

In carrying out my improvement I make use of two illuminating structuresD D, one

of which may be a reflecting-illuminator and the other a prismaticilluminator, although both may be of one kind. In Fig. 1 the structure Dis arranged as a canopy in an inclined position outside of a window andconsists of a frame A, supporting a series of reflectingplates F,covered by a glass plate B. The window in this case has a fixed uppersash N, with a plane glass B at the upper portion and with the prismaticilluminator D in the lower portion. The reflecting-illuminator D and theprismatic illuminator D may be each of any suitable construction orcharacter; but the relative construction and arrangement are such thatthe light-rays, such as 2,

0 which pass directly through the structure D and fall on the structureD, will be turned in an approximately horizontal direction into theroom, as at 2, while those, such as 1, which are deflected by thestructure D will pass to 5 and without change through the plane part- B'of the Window, as at 1. Thus in Fig. 1

the canopy structure D receives the main incident rays from thedirection 1 and deflects them into the room through the plain upperportion of the window in the direction 1. The

rays falling from the direction 2 or those approximately parallel to theplane of the refiecting-strips F of the canopy pass through thestructure between and without being deflected by the strips and wouldordinarily pass through the window without produc ing any increasedilluminating efiect in the back of the'room. I utilize these rays by theaction of the structure D, which turns them into the room by refractionor refraction and reflection combined in the direction 2% generallyparallel to the direction 1*. Fig.

2 illustrates the combination for producing the same effect, differingfrom Fig. 1 only in that the canopy structure is prismatic in characterand the structure in the window is reflecting. In this case theapproximately horizontal rays, such as 3, which fall on the reflectingpanel D, are transmitted unchanged in direction, as at 3, by a double 7oreflection from the adjacent faces of two successive strips, as fullyset forth in my application Serial No. 675,796. In either case thecombination secures the direction into the room of a much largerquantity of light than would be secured by the use of a singledeflection D and D alone.

Without limiting myself to the precise construction and arrangement ofparts shown, I claim An illuminating structure consisting of twoseparate illuminators each having parallel deflecting-faces,oneconstructed and arranged to deflect substantially the whole body of raysfalling upon it at certain angles, directly into the space to beilluminated, and to transmit unchanged in direction rays falling upon itat other angles, and the other illuminator, constructed and arranged toreceive these latter rays and to deflect them also into the space to beilluminated in a direction substantially parallel to that imparted tothe body of rays deflected by the first illuminator, substantially asset forth.

In testimony whereof I have signed my 5 name to this specification inthe presence of two subscribing witnesses.

FRANK L. O. WADSWORTH.

Witnesses:

HARRY E. HAY, W. CLARENCE DUVALL.

